Thanks for the in-depth reply!
Drum is definitely better, I cut the Shrapnel Blasts for Drums, and the deck runs a lot smoother.
The sideboard still feels underdeveloped The Jittes seem bad in theory, but have been quite solid for me against Goblins, Elf Aggro and the mirror. As soon as there is a better option, I'll probably switch.
I'm thinking about cutting one each of Needle, Crypt and Chalice for 3 more sideboard slots. What would you recommend?

